Hi there -- I am having a likely benign lump surgically removed in August 2023 at recommendation of pathologist and surgeon, but I'm meeting with second-opinion breast surgeon tomorrow to see if they can dial in a diagnosis before we head to surgery. Maybe it'll head off surgery, but I'm accepting that it probably won't. I'm 52, no family history, my health is wonderfully blessedly normal. Small spot showed up on routine mammogram Nov. 2021, ultrasound/biopsy confirmed "benign epithelial lesion." 6-month follow up showed nothing, so I was returned to yearly screening, and boom, the lump grew in a year's time when I got my next mammo. First they suspected Phyllodes because in a year, it grew from millimeters in size to about the size of a peanut (2.1x2.5 cm). First biopsy pathology report indicated ADH which put me in the same exact headspace you're in and led me to this forum. But they also had to send the samples out to other pathologists because they weren't sure of actual diagnosis. Now I have the report and it says there is no atypia. "You're a mystery," the surgeon said to me, "But we would be really, REALLY surprised if this was cancer." I. Hate. Surprises. Now they're just scattering out a bunch of benign differential diagnoses including Phyllodes, PASH, fibroadenoma. I know Phyllodes can also be (or become) malignant in some cases, so for that reason alone, I want it out. Even though I'd rather not have to go through surgery, we all want to know exactly what this mass IS. Bonus will be that I don't have to biopsy this same danged spot ever again! I totally understand your frustration and confusion about what to do. Can you get a second or third opinion to help guide you?